Bump Dots - Black Large Rounded-Top Round Bump Dots - These soft plastic self-adhesive low vision bump dots can be placed in a variety of places for tactual identification of everyday items. These black bump dots for the visually impaired can be used on computer keyboards musical keyboards telephone keypads television keypads remote control keypads and more. Peel and stick adhesive bump dots onto any clean non-porous flat surface. Twenty low vision bump dots come in every package. Size: .700 wide x .380 tall. Look for other sizes and shapes to differentiate between bump dots used in the same area. Product dimensions (imperial): 0.7 inch H x 0.38 inch L Product dimensions (metric): 17.78 mm H x 9.65 mm L